<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
</head>
<body>
<h1>欢迎使用！！！</h1>
<div>
    <input id="a" type="text" placeholder="请输入数字" name="anum">
    <input id="s" type="text" placeholder="请输入运算符：+ - \ *" name="symbol">
    <input id="b" type="text" placeholder="请输入数字" name="bnum">
    <br>
    <button onclick="getinput()">确认</button>
</div>
</body>
<script src="js/calculation.js"></script>
</html>